EPSF scaling

Usually, you will want to scale an EPSF figure to some size appropriate for your document, since its natural size is determined by the creator of the EPS file.

The best way to do this is to assign the desired size to the TeX \epsfxsize or \epsfysize variables, whichever is more convenient for you. That is, put

\epsfxsize=dimen

right before the call to \epsffile. Then the width of the TeX box will be dimen and its height will be scaled proportionately. Similarly, you can set the vertical size with

\epsfysize=dimen

in which case the height will be set and the width scaled proportionally.

If you set both, both will be honored, but the aspect ratio of the included graphic may necessarily be distorted, i.e., its contents stretched in one direction or the other.

You can resize graphics in a more general way by redefining the \epsfsize macro. \epsffile calls this with two parameters: the natural horizontal and vertical sizes of the PostScript graphic. \epsfsize must expand to the desired horizontal size, that is, the width of the \vbox. Schematically:

\def\epsfsize#1#2{body}

Some useful definitions of body:

`\epsfxsize'

This definition (the default) enables the default features listed above, by setting \epsfxsize to the same value it had before the macro was called.

`#1'

Force the natural size by returning the first parameter (the original width).

`0pt'

A special case, equivalent to `#1'.

`0.5#1'

Scale to half the natural size.

`\hsize'

Scale to the current \hsize. (In LaTeX, use \textwidth instead of \hsize.)

`\ifnum#1>\hsize\hsize\else#1\fi'

If the natural width is greater than the current \hsize, scale to \hsize, otherwise use the natural width.

For compatibility with other PostScript drivers, it is possible to turn off the default scaling of included figures by the DVI magnification with the following TeX command:

\special{! /magscale false def}

Use of this command is not recommended because it will make the \epsffile graphics the "wrong" size if global magnification is being used, and it will cause any PostScript graphics to appear improperly scaled and out of position if a DVI to DVI program is used to scale or otherwise modify the document.

DVI magnification is not applied to any output from code you write in `bop-hook' or its ilk (see section PostScript hooks),